22021203321012 has 192 divisors, whose sum is σ = 64215136419840. Its totient is φ = 5727798835200.

The previous prime is 22021203320989. The next prime is 22021203321037. The reversal of 22021203321012 is 21012330212022.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22021203321012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89697187 + ... + 89942357.

It is an arithmetic number, because the mean of its divisors is an integer number (334453835520).

Almost surely, 2^{22021203321012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021203321012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32107568209920).

22021203321012 is an abundant number, since it is smaller than the sum of its proper divisors (42193933098828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021203321012 is a wasteful number, since it uses less digits than its factorization.

22021203321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247262 (or 247260 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 22021203321012 its reverse (21012330212022), we get a palindrome (43033533533034).

The spelling of 22021203321012 in words is "twenty-two trillion, twenty-one billion, two hundred three million, three hundred twenty-one thousand, twelve".